The Black Eyed Kids are soul stealers. They come from a land created by the energy of human imagination.  This alternate universe is layered on top of our world, like a blanket.  It is filled with all the good, evil, greed, love, anger, and fantasies of the human psyche. 
Spiritualists have determined this land exists and realize that the way you die determines where your soul goes.  If a persons soul is stolen, that creates bad energy... fuel for the creatures that go bump in the night...